Controller and method for controlling a motor vehicle

A motor vehicle control system comprising a controller, the controller comprising:

• means for receiving a signal indicative of a surface friction parameter, said surface friction parameter corresponding to a coefficient of friction between a road wheel and a driving surface;
• means for receiving a signal indicative of a position of an accelerator control with respect to an allowable range of positions;
• means for determining a critical powertrain torque limit value in dependence at least in part on the signal indicative of a surface friction parameter;
• and
• means for providing a traction warning indication to a driver in dependence on the signal indicative of a position of an accelerator control and the critical powertrain torque limit value.

A motor vehicle comprising a controller, the controller comprising:

• means for receiving a signal indicative of a surface friction parameter, said surface friction parameter corresponding to a coefficient of friction between a road wheel and a driving surface;
• means for receiving a signal indicative of a position of an accelerator control with respect to an allowable range of positions;
• means for determining a critical powertrain torque limit value in dependence at least in part on the signal indicative of a surface friction parameter;
• and
• means for providing a traction warning indication to a driver in dependence on the signal indicative of a position of an accelerator control and the critical powertrain torque limit value.

A method implemented by means of a controller comprising:

• receiving a signal indicative of a surface friction parameter, said surface friction parameter corresponding to a coefficient of friction between a road wheel and a driving surface;
• receiving a signal indicative of a position of an accelerator control with respect to an allowable range of positions;
• determining a critical powertrain torque limit value in dependence at least in part on the signal indicative of a surface friction parameter;
• and
• providing a traction warning indication to a driver in dependence on the signal indicative of a position of an accelerator and the critical powertrain torque limit value.

A motor vehicle comprising a control system, the control system comprising a controller, the controller comprising:

• means for receiving a signal indicative of a surface friction parameter, said surface friction parameter corresponding to a coefficient of friction between a road wheel and a driving surface;
• means for receiving a signal indicative of a position of an accelerator control with respect to an allowable range of positions;
• means for determining a critical powertrain torque limit value in dependence at least in part on the signal indicative of a surface friction parameter;
• and
• means for providing a traction warning indication to a driver in dependence on the signal indicative of a position of an accelerator control and the critical powertrain torque limit value.